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Siderite
Siderite

Pollucite
Pollucite



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Siderite
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Pollucite

Siderite and Pollucite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
Readily soluble in HF

Durability

-
-

Specific Gravity

3.83-3.892.86-2.94
1 7.18
👆🏻

Fracture

Uneven, Conchoidal
Conchoidal, Uneven

Cleavage

Perfect on {01 1 1}
None observed

Mohs Hardness

3.5-4.56.5-7
2 10
👆🏻

Chemical Composition

Fe2+ CO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Siderite and Pollucite Chemical Formula

While comparing Siderite and Pollucite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Siderite and Pollucite chemical formula.

  • Chemical formula of Siderite- Fe2+ CO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Siderite and Pollucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Siderite and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Siderite and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Siderite is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.